A prepackaged mixture of seed that is appropriate for your region can be purchased at most garden centers and big box stores. Per NCSU’s TurfFiles site, this mixture is “often planted in home lawns to combine the heat/drought tolerance of tall fescue with the recuperative potential of Kentucky bluegrass.” Please note that the to-do list suggests seeding only if it was not done in September. Fall seeding of fescue lawns is preferable, as “spring-established tall fescue is more susceptible to drought, heat, fungal diseases, and weed encroachment” (http://www.turffiles.ncsu.edu/news/spring-seeding-tall-fescue). Good luck with your lawn!